Ahospital cafeteria has 20 tables. 65% of the tables have 6 chairs at each table

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!